Chapter 4: Mass, Weight and Density

Question 1

What is mass?

Answer 1

The amount of matter in a body

Question 2

What is the SI unit of mass?

Answer 2

Kilogram (Kg)

Question 3

What is the quantity of mass?

Answer 3

Scalar quantity

Question 4

How is mass measured?

Answer 4

Beam balance / Calibrated electronic balance

Question 5

What is weight?

Answer 5

A gravitational force

Question 6

What is the SI unit of weight?

Answer 6

Newton (N)

Question 7

What is the quantity of weight?

Answer 7

Vector quantity

Question 8

What is the formula of weight?

Answer 8

W = mg
m is mass (Kg)
g is gravitational field strength

Question 9

How is weight measured?

Answer 9

Spring balance

Question 10

What is gravitational field?

Answer 10

A region in which a mass experiences a force due to gravitational attraction

Question 11

What is gravitational field strength?

Answer 11

The gravitational force acting per unit mass

Question 12

What is inertia?

Answer 12

The reluctance of an object to change its state of rest or motion, due to its mass

Question 13

Relationship of inertia

Answer 13

Mass is a measure of inertia

The greater the mass of an object, the greater its inertia

Question 14

What is density? SI Unit + Formula also

Answer 14

Mass per unit volume
SI Unit: kilogram per cubic metre (kg m^-3)
Formula: p = m / v
m is mass (kg)
v is volume (m^3)